Cutter for pencil sharpeners



. Get. 9 1923. 1,470,416

A. P. WILSON CUTTER FOR PENCIL SHARPENERS I Filed June 17. 1920 2 Sheets-Sheet 1 Oct. 9 1923.

A. P. WILSON CUTTER FOR PENCIL SHARPENERS- Filed June 1'7, 1920 2 Sheets-Sheet 2 Patented on. 9, 1 923.

ALLEN P. wrnson, or WALTHAM, isessecrrusnrrs, nssrenon TO nos'ron rnncrn POINTER GQMEANY, or wsnrnsia, nrsssacnusnrrs. a conronnrron or MASSA cH snTTs.

AppIication medium 17,

To all whom it may concern-1 Be it known that 1,,ALLEN P. Watson, a citizen of the United States, and resident oi. l/Valtham', in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Cutters for Pencil Sharpeners, of which the following is specification. This invention relates to cutters for pencil sharpeners with the object in view of providing a hollow cutter which is de veloped from sheet metal@ 7 1 Y Anothercbject is to providea cutter of this character in'which a sheet metal blank is struck up to produce'one or more pencil sharpening blades andithe blank then be i11 curved andits side ClgBSJlHli'QCl to form a tube having the sharpening blade or blades arranged exteriorly thereon.

Practical embodiments of my invention are represented in the accompanying draw: ings in which,

Fig. 1 represents a plan view of a piece of sheet metal from which a blank for one form of my improved cutter is taken.

Fig. 2 represents an edge view of the same. Fig. 3 represents a'plan view of the blank struck up to producethe pencil sharpening blades thereon. a

Fig. 4 represents a vertical section taken in the plane of the line IV--IV of Fig. 8. Fig. 5 represents a side viewot' the cutter.

the pencil sharpening bladesbeing shown,

arranged spirally and exteriorly thereon, said cutter'having, the driving. and bearing elements applied thereto. F10; 6 re resents an enlar ed detail sec b p b tion of the cuttershowing a means of reinforcing the cutter'blades.

Fig. 7 represents a similar view showing another means of reinforcing the cutter blades. 7

Fig. S represents a similar view of the cutter without any reinforcement.

Fig. 9'represents a view-similar to'Figp 'enlng blades 8', either continuous orintershowing interrupted blades.

' Fig. 10 represents a plan view of a piece of sheet metal from which a blank for a modified form of cutter is taken. I

'Fig. 11 represents an edge viewv oi. the

same.

F ig. 12 represents a plan View of the CUTTER FOR PENCIL SHARPENEES;

1920. Serial No. 389,648.

blank struck up to produce the pencil sharpening blades.

Fig. 13 repres n.1s a verticalsection taken in the plane oi he line XIIIXIII '0; Fig. 12. i

Fig.14 represents a side Viewv of the cutter, the pencii'sharpening lades being shown arranged stralght and enteriorly thereon and having the driving and bearing elements applied thereto. J r

Fig. 15 represents an. enlarged detail section showing a means of reinforcing the cutter and blades Fig. 1.6 represents a similarview showing another vmeans of reinforcing the cutter blades. i

- Fig. 17 represents a similar View of the cutter without anyreintorcement;

Fig. 18 represents a viewsimilar to Fig. 12 showing interrupted blades. In the embodiment shown in Figs. 1 to 9 inclusive the rotatable cutter comprises a tube 1 shown cylindrical in the present in stance, which tube is producedas follows A blank 2 of rhomboidal form is cut from a piece of sheet metal 3 and it is struck up by stamping, rolling or otherwise to produce pencil sharpening blades 4, either continuous or interrupted, which project outwardly from the surface of the blank. These sharpening blades aret'ormed parallel to the diagonal side edges 5 so thatwhen the'blank is curved into itst tubular form, the sharpening blades :will be ar ranged spirally and exteriorly thereon, with the abutting side edges ofthe blank meeting at a point between two sharpening blades. 'These' side edges may be perma nently united by any. well known or ap proved means.

In the embodiment represented in Figs. 10 to 18 inclusive the blank 6 is ofrec- "tangular form and is cut froma piece of sheet metal 7 and is struck by stamplng,

rolling or otherwise to produce pencil sharprupted, which project outwardlv from the surface of the blank. These sharpening blades are formed p'a-rallelto the side edges 9 so thatwhen the blank is curved into its tubular form the straight exterior sharpeningblades willbe arranged longitudinally 'eni'ng'blades. These side edges may be perinanently united by any Well known or ap thereon, with the abuttino" side edges of the blank meeting at a point between two sharpproved means. V o 7 in both of the emL-odimentsherein shown and described, one end of the cutter may be provided with an element 10 forming a. shaft bearing and the other end of the cutter may be provided with an element, in the present instance a gear '11, forming both a shaft 7 bearing and a driving element;

It so desired the cutter blades'mav be suitably reinforced. In the form shown in Figs. 6 and 15, the reinforcement is tube snugly titted within the cutter and proforcement is a suitablecomposition l l. such for instance, as hard rubber or wax composition.

It is to be understood that the curving of I the blank into its tubular form may be acromplished by anysuitablc devices of. a well known or. approved-type.

It is also to be understood that after the tube has been completed it may be hardened by any Well known or approved process and if so desired, the exterior sharpening blades maybe suitably sharpcned. I

Vv hat I olainris;

1. A rotatable cutter for pencil sharpeners coniprisinge shectmetal tube provided with a driving element, said tube "having- ,one or more exterior pencil sharpening blades struck up ti erei-rom, and means engaging the 'undersides of said blades for reinforcing them. r,

2 A rotatable cutter for oencil Sharpeners comprising a sheet metal tube provided; with a driving element, said tube having one or more exterior pencil sharpening in the tube projectingoutwardly along thejundersides of said blades. for reinforcing them.

3; Arotatable cutter for pencil s. a rpeners comprising sheet metal tube having one or more exterior pencil sharpening blades struck up therefrom, and reinforcing'means engaging theunderside of said blade or blades.

4; A rotatable cutter for pencil Sharpeners 7 comprising, a sheet metal tube'liaving' one or 'more exterior pencil sharpening blades struck up therefrom, and reinforcing means within the tube projecting outwardly along the underside oilt'said blade or blades.

as my invention; I have signed my naine thisfifth day of June. 1920.

ALLEN P. wncson.

blades V 1 In testimony. that I claim the foregoing 

